Quad Displayへの道

nvidia-settings(1) を使えばよかった。かなり遠回りした。

usr/bin/nvidia-xconfig -a --multigpu=Auto --randr-rotation --separate-x-screens --xinerama 

とかで上書き。

単一のカードからでた出力は1つのモニタを作る。かなり意外だった。

# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig:  version 1.0  (buildmeister@builder58)  Fri Mar 12 02:12:40 PST 2010

# Xorg configuration created by pyxf86config
# re-written by hand
# references:
#   https://calomel.org/mulidisplay_xorg.html
#   http://ubuntu-ky.ubuntuforums.org/showthread.php?t=1354736

Section "ServerLayout"

    #Screen       "Screen2" Leftof "Screen A" #Right G2220HD, upcomming.
    #Screen         "ExtraScreen" 3840 0 # Rightof "Screen A" #Princeton
    Identifier     "Default Layout"
    Screen      0  "Screen A"
    Screen      1  "Screen B" RightOf "Screen A"
    Screen      2  "Screen C" RightOf "Screen B"
    # Screen      3  "Screen D" RightOf "Screen C"
    InputDevice    "Mouse0" "CorePointer"
    InputDevice    "Keyboard0" "CoreKeyboard"
    Option         "Xinerama" "1"
    Option         "Clone" "off"
EndSection

Section "Files"
    RgbPath         "/usr/share/X11/rgb"
    FontPath        "unix/:7100"
EndSection

Section "Module"

    # http://us.download.nvidia.com/XFree86/Linux-x86/1.0-9755/README/chapter-03-section-02.html
    # It is a submodule used by other video drivers. A fbdevhw module is currently 
    # available for linux framebuffer devices. 
    # video for linux
    #"Load "GLCore"
    #"Load "dri"  # won't boot.
    Load           "nvidia"
    # proprietary nvidia driver.
    Load           "dbe"
    # Double Buffering
    Load           "extmod"
    # misc extension
    Load           "fbdevhw"
    # provides functions for talking to a framebuffer device. It is os-specific. 
    Load           "glx"
    # OpenGL for X window
    Load           "record"
    Load           "freetype"
    Load           "type1"
    # Load  "v4l"
    Load           "ddc"
    Load           "int10"
EndSection

Section "ServerFlags"
    Option         "Xinerama" "on"
    Option         "Clone" "off"
    # Option         "AutoAddDevices" "off"
    Option         "AutoAddDevices" "on"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/input/mice"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"
    Identifier     "Keyboard0"
    Driver         "kbd"
    Option         "XkbModel" "pc101"
    Option         "XkbLayout" "us"
EndSection

Section "Monitor"
    Identifier     "MonitorAB"
    VendorName     "Unknown"
    ModelName      "Unknown"
    HorizSync       28.0 - 33.0
    VertRefresh     43.0 - 72.0
    Option         "DPMS"
EndSection

Section "Monitor"
    Identifier     "MonitorCD"
    VendorName     "Unknown"
    ModelName      "Unknown"
    HorizSync       28.0 - 33.0
    VertRefresh     43.0 - 72.0
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device A"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce 7600 GS"
    BusID          "PCI:1:0:0"
    Screen          0
EndSection

Section "Device"
    Identifier     "Device B"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce 7600 GS"
    BusID          "PCI:1:0:0"
    Screen          1
EndSection


Section "Device"
    Identifier     "Device C"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce 7600 GS"
    BusID          "PCI:2:0:0"
    Screen          0
EndSection

#Section "Device"
#    Identifier     "Device D"
#    Driver         "nvidia"
#    VendorName     "NVIDIA Corporation"
#    BoardName      "GeForce 7600 GS"
#    BusID          "PCI:2:0:0"
#    Screen          1
#EndSection

Section "Screen"
    Identifier     "Screen A"
    Device         "Device A"
    Monitor        "MonitorAB"
    DefaultDepth    24
    Option         "RandRRotation" "True"
    Option         "MultiGPU" "off"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

Section "Screen"
    Identifier     "Screen B"
    Device         "Device B"
    Monitor        "MonitorAB"
    DefaultDepth    24
    Option         "RandRRotation" "True"
    Option         "MultiGPU" "off"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

Section "Screen"
    Identifier     "Screen C"
    Device         "Device C"
    Monitor        "MonitorCD"
    DefaultDepth    24
    Option         "RandRRotation" "True"
    Option         "MultiGPU" "off"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

#Section "Screen"
#    Identifier     "Screen D"
#    Device         "Device D"
#    Monitor        "MonitorCD"
#    DefaultDepth    24
#    Option         "RandRRotation" "True"
#    Option         "MultiGPU" "off"
#    SubSection     "Display"
#        Depth       24
#    EndSubSection
#EndSection

Section "Extensions"
    Option         "Composite" "Disable"
EndSection